Paige was starting to tell mommy that Matthew could be a source. Now that mom killed a mugger that had the audacity to touch Paige, & Paige sees mom & dad Iin a different light, maybe she starts to open up to Matthew instead. Stan's rage when he realizes that Phillip directly killed Amadore & ruined Martha's & John Boy's lives would be epic.
And to think, Phillip & Elizabeth only had ~5-1/2 years to go to irrelevance in their primary field (KGB spies) & a smidge more than a decade to go to irrelevance in their 2ndary field (travel agents). If they'd find a way to reach retirement age, they could do it w/ clear consciences knowing there was nothing left for them to do.